#include<stdio.h>
#include<string.h> 
int main()
{
	int i=0,count=0;
	char a;
	while(a!='\n')
	{
		i++;
		count++;
	for(i=0;i<=count;i++)
	{
		a=getchar();
		if(a>='a'&&a<='x')
		a=a+2;
		else if(a=='y'||a=='z')
		a=(a+2-'a')%26+'a';
		else
		continue; 
		putchar(a);
	}
    }  
}
